Hitachi S10mini D, Hardware Manual

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8 EXPLANATION OF OPERATION
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8.4.3 Updating the date
The date is automatically updated as follows:
January, March, May, July, August, October, or December 31
→
first day of the next month
April, June, September, or November 30
→
first day of the next month
February 28 in a common year
→
March 1
February 29 in a leap year
→
March 1
8.4.4 Restrictions on the setting of dates and times
Do not set the following dates and times. Otherwise, the date or time would not be updated.
Setting Example
23:59:59 on 29 of any month. When this date and time is set, it is updated to the first day of the
next month except for February in a leap year.
March 29
→
April 1
23:59:59 on April, June, September, or November 30. When this date and time is set, it is updated
to 31 of that month.
April 30
→
April 31
23:59:59 on February 28 in a common year. When this date and time is set, it is updated to
February 29.
February 28
→
February 29
23:59:59 on February 28 in a leap year. When this date and time is set, it is updated to March 1.
February 28
→
March 1
8.4.5 Clock
precision
The clock precision varies with the ambient temperature. The following graph shows typical
precisions at various temperatures. There are variations in precision between products. Use
the values in the graph plus or minus one minute per month as a reference. When a high
precision is required, use the clock while calibrating it or at the appropriate temperature range
(around 25°C).
0 5 10 15 20 25 30 35 40 45 50
0
0.5
1.0
1.5
2.0
Error per month (minutes)
Temperature (˚C)